Flip lid



FIG. 1 is a top right perspective view of a flip lid showing our newdesign;

FIG. 2 is a right side elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a front elevational view thereof; and,

FIG. 5 is a top plan view thereof.

The ornamental design for a flip lid, as shown and described.